Ian McConnell wrote: > > If you can use Psyco and your FITS lines are really long (well, maybe > > too much, the treshold if about >~3000 in my PC) you can use something > > like this instead the builtin timsort: > > http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/466330 > > (To compute the median on a image line the median that uses sort is > > probably better in most cases, expecially if you use the built in sort > > of numerical libraries.) > > sort() sorts all of the data, but you're only after one or two numbers, so > the MODFIND method may be faster for the median:
The modified quicksort I have shown in the cookbook (466330) is O(n) too, and it modifies the list in place, so you can apply it twice for lists of even len. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
